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Filming for the fourth season finished in Cornwall last year, with fans racing to Charlestown, Holywell Bay and other key shooting locations in a hope to catch a glimpse of the star.

After an explosive series three, the fourth installment of the BBC hit is due to start in the next couple of months.

Aidan Turner

The series traditionally airs in autumn but last season it was released in August, so if this year’s instalment is due to be released earlier than that, then we could expect to be watching it in June or July.

Fans were heartbroken by the twist in the final episode, which has made the wait for the fourth season even more agonising.

In a recent interview executive producer Debbie Horsfield revealed that Demelza's infidelity will continue to be a major theme in the next season.

Aidan Turner, as Ross Poldark, had every reason to eye Demelza, played by Eleanor Tomlinson, suspiciously in series three, which has just ended (Image: Chris Jackson/Getty Images)

She told the Radio Times: "What we explore in the fourth series, essentially, is her reasons for this little excursion, shall we say, are many and complex."

She said that the pair will be "working through this sticky patch" when the show returns.

The Cutting It writer added: “It's very much Cornwall-based but there are so many characters and flavours and one of those flavours is London. That's a thing we haven’t really seen.

"There are whole sequences where we go to London and that’s a really exciting new flavour to it. We will meet real characters, like [Prime Minister] William Pitt and [anti-slavery campaigner] William Wilberforce.”

So it seems there could be yet more drama headed for Demelza...

Eleanor Tomlinson at the BAFTAs

Tomlinson, 25, recently revealed that her character will face struggles revolving around how Ross responds to her as the “boss”.

She explained: “Demelza becomes more independent, because Ross goes off to London and she very much becomes the boss of Nampara.

“That is her power – she and Ross are on an equal level and I wonder how he will respond to that.”

Horsfield said that series four will include “animosity” and “moral” struggles.